From: Andrew Morton <akpm@osdl.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: rdunlap@xenotime.net, rmk+serial@arm.linux.org.uk,
linux-kernel@vger.kernel.org
Subject: Re: soft lockup in serial8250_console_write(?)
Date: Tue, 14 Mar 2006 15:45:45 -0800 [thread overview]
Message-ID: <20060314154545.060fac2c.akpm@osdl.org> (raw)
In-Reply-To: <20060314232515.GA21782@elte.hu>
Ingo Molnar <mingo@elte.hu> wrote:
>
>
> * Randy.Dunlap <rdunlap@xenotime.net> wrote:
>
> > > > This function calls wait_for_xmitr() [inline], which in worst case can
> > > > spin for 1.010 seconds. Could this be the cause of a soft lockup?
> > >
> > > hm, it shouldnt cause that. Could you try the attached patch [which is
> > > the next-gen softlockup detector], do you get the message even with that
> > > one applied?
> >
> > 5/5 good boots with your new patch.
> > 5/5 soft lockups without it.
> >
> > Is this scheduled for post-2.6.16 ?
>
> yes, in theory. Andrew?
>
Which? timer-irq-driven-soft-watchdog-cleanups.patch? Yup.
prev parent reply other threads:[~2006-03-14 23:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-14 21:41 soft lockup in serial8250_console_write(?) Randy.Dunlap
2006-03-14 21:40 ` Ingo Molnar
2006-03-14 23:18 ` Randy.Dunlap
2006-03-14 23:25 ` Ingo Molnar
2006-03-14 23:45 ` Andrew Morton [this message]
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